Digital clock



FIG. 1 is a top plan view of a digital clock showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken-line showings of representative numbers in FIG. 1 areenvironmental only and form no part of the claimed design.

The ornamental design for a digital clock, as shown and described.